Joe West
05-09-2005, 09:20 PM
------------------------------
Date: Tue, 2 Nov 1999 15:43:13 EST
From: FrankCB@aol.com
Re: <VV> Powerglide adjustments
Dorai,
Does it downshift harshly (with a lurch) when you are slowing down to a
stop? If so, then you probably have a vacuum leak in the line from the carb
crossover down to the vacuum modulator on the transmission. Each end of this
line has a rubber hose which can easily deteriorate and leak, causing harsh
upshifts and downshifts. If this is NOT your problem, you probably have the
idle speed too high. Frequently the fast idle on the chokes brings in too
high a "cold" idle speed. If the situation you describe gets better when the
engine is fully warmed, then cold idle speed is at least part of the problem.
GM seemed to believe that all Corvair owners lived in northern Canada and
needed lots of choke and high cold idle speeds. I would set the chokes only
rich enough to enable cold weather driving without stalling in your
particular region. I've had other carbureted cars besides the Corvair that
had way too much choke and cold idle speed even for northern NJ. More modern
cars with computer controlled idle speeds and more sophisticated ambient
temperature sensing are much better in this regard.
See if you can get a tachometer and a vacuum gauge on the engine to
assist in getting both the hot and cold idle speeds as low as possible. It
does require a lot of back and forth adjustment to accomplish this, however.
Good luck,
Frank Burkhard
In a message dated 11/2/99 5:55:04 AM Eastern Standard Time, violaw@yesic.com
writes:
> Can someone please help me? I have this '66 110 powerglide, the problem
> is that when I put it in gear it does not go in smoothly it tends to jump a
> bit, then it does not shift up till about 30 - 35 mph. I have lowered the
> idle as low as it will go. Once the motor is warm it shifts up alright but
> it still jumps a bit when I put it in gear. I was looking at the book for
> some adjustments. In the book it looks like the pin on the lever attached
> to the rod coming out of the tranny, should be 3/8" +-1/16" below the
> joint. In my car the pin is about 1" above the joint. Any suggestions are
> gladly welcome.
> Thanks in advance.
Date: Tue, 2 Nov 1999 15:43:13 EST
From: FrankCB@aol.com
Re: <VV> Powerglide adjustments
Dorai,
Does it downshift harshly (with a lurch) when you are slowing down to a
stop? If so, then you probably have a vacuum leak in the line from the carb
crossover down to the vacuum modulator on the transmission. Each end of this
line has a rubber hose which can easily deteriorate and leak, causing harsh
upshifts and downshifts. If this is NOT your problem, you probably have the
idle speed too high. Frequently the fast idle on the chokes brings in too
high a "cold" idle speed. If the situation you describe gets better when the
engine is fully warmed, then cold idle speed is at least part of the problem.
GM seemed to believe that all Corvair owners lived in northern Canada and
needed lots of choke and high cold idle speeds. I would set the chokes only
rich enough to enable cold weather driving without stalling in your
particular region. I've had other carbureted cars besides the Corvair that
had way too much choke and cold idle speed even for northern NJ. More modern
cars with computer controlled idle speeds and more sophisticated ambient
temperature sensing are much better in this regard.
See if you can get a tachometer and a vacuum gauge on the engine to
assist in getting both the hot and cold idle speeds as low as possible. It
does require a lot of back and forth adjustment to accomplish this, however.
Good luck,
Frank Burkhard
In a message dated 11/2/99 5:55:04 AM Eastern Standard Time, violaw@yesic.com
writes:
> Can someone please help me? I have this '66 110 powerglide, the problem
> is that when I put it in gear it does not go in smoothly it tends to jump a
> bit, then it does not shift up till about 30 - 35 mph. I have lowered the
> idle as low as it will go. Once the motor is warm it shifts up alright but
> it still jumps a bit when I put it in gear. I was looking at the book for
> some adjustments. In the book it looks like the pin on the lever attached
> to the rod coming out of the tranny, should be 3/8" +-1/16" below the
> joint. In my car the pin is about 1" above the joint. Any suggestions are
> gladly welcome.
> Thanks in advance.